Would DFU have timeout counting to prevent unexpected entering?

[Jeffery]

Hi sir If nRF51822 unexpectedly enter DFU OTA mode, did boot loader have timeout counting to exit DFU? Besides, if nRF51822 entered DFU mode and didn't update new firmware, nRF51822 still can work with old firmware after exiting DFU? Thanks

[Ole Morten]

That's yes to both your questions. The bootloader uses a timeout of 60 s by default. Also, by default the bootloader is dual bank, meaning that the old application will not be deleted before the complete new application have succesfully been received.

[Tim Clark]

Running into the same issue -- did you ever manage to find a solution?